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Service bulletins for the 2018 Porsche 911

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

589 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
No. 36-212021-07-06. Service bulletin. WHEELS. List of approved wheels and tires for the 911.
No. 35-212021-07-06. Service bulletin. WHEELS. List of approved wheels and tires for the 911.
No. D5732021-07-06. Service bulletin. SUSPENSION. Parts withdrawal information for a shock absorber.
PIWIS2101aa2021-07-06. Service bulletin. EQUIPMENT. Information on new PIWIS Tester update #40.250.040
No. 2100.12021-07-06. Service bulletin. ELECTRICAL SYSTEM. Information on offline MAP service updates for the PCM4 and PCM5.
No. D13.22021-07-06. Service bulletin. EQUIPMENT. Information on new PIWIS Tester program for independent repair facilities.
PIWIS2101z2021-07-06. Service bulletin. EQUIPMENT. Information on Porsche PIWIS Tester update #40.250.030 & .035.
ATIALL416052021-06-28. Service bulletin. EQUIPMENT; SERVICE BRAKES. Understanding and addressing brake squeal complaints.
ATIALL416042021-06-28. Service bulletin. EQUIPMENT; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. 2003 to Present All with tire pressure monitoring system.
ATIALL16012021-06-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 1997 to Present - Vehicle Analysis Log Types - In an effort to prode accurate information regarding the state of the vehicle at the time fof VAL creation, a "log type" drop down menu was added at the end of the VAL creation menu.
ATI991415032021-06-28. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR; SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, AIR:DISC:ROTOR. Clicking Noise From Front PCCB Rotors -
ATI016022021-06-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The Approval and Support Management Program (ASM)
WMD12021-06-03. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Porsche intranet posting with preliminary information for Porsche workshop campaign WMD1 Workshop Campaign -PCM Software Update.
No. 17-212021-06-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved engine oils for new and classic Porsche models.
PIWIS2101y2021-06-02. Service bulletin. EQUIPMENT. Information on Porsche PIWIS Tester III Online Update 40.200.020.
PIWIS2101x2021-06-02. Service bulletin. ELECTRICAL SYSTEM. Information on Porsche PIWIS Tester III Online Update 40.200.000, .010, .015 & .016.
No. 04-21-32021-06-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Instructions on how to fix an error in the PCM showing that Satellite and Google Earth Map are no longer available.
ExtW9912021-05-05. Service bulletin. ENGINE AND ENGINE COOLING. Porsche intranet posting for an extended warranty for the 991 generation 911 coolant pump and valve block.
WMD12021-05-05. Service bulletin. ELECTRICAL SYSTEM. Porsche intranet posting with information on Workshop Campaign WMD1 - PCM Software Update.
No. 52-212021-05-05. Service bulletin. ELECTRICAL SYSTEM. Information on how to deal with a potential cyber security breach.
No. 14-212021-05-05. Service bulletin. ENGINE AND ENGINE COOLING. Information on an extended warranty for a coolant pump and Valve block on the 911.
No. 21062021-05-05. Service bulletin. WHEELS. Advanced technical information on how to remedy a clicking noise from Centerlock wheels from the 991 generation 911.
No. 60-21-32021-05-05. Service bulletin. ELECTRICAL SYSTEM. Porsche service campaign information for Workshop campaign WMD1 - Performing PCM Software Update.
No. D4a2021-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Historical information on Porsche product evolution.
No. 13-212021-04-05. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. List of approved C20 style engine oils for classic and new Porsche models since 1984.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.